The Na+/Ca2+ exchanger isoform 3 (NCX3) but not isoform 2 (NCX2) and 1 (NCX1) singly transfected in BHK cells plays a protective role in a model of in vitro hypoxia.

Abstract:

:Chemical hypoxia produces depletion of ATP, intracellular Ca2+ overload, and cell death. The role of Na+/Ca2+ exchanger (NCX), the major plasma membrane Ca2+ extruding system, has been explored in chemical hypoxia using BHK cells stably transfected with the three mammalian NCX isoforms: NCX1, NCX2, and NCX3. Here we report that the three isoforms show similar activity evaluated as [Ca2+]i increase evoked by Na+-free medium exposure in Fura-2-loaded single cells and NCX3 transfected cells are less vulnerable to chemical hypoxia compared to NCX1- and NCX2-transfected cells, suggesting that NCX3 could play a more relevant protective role during chemical hypoxia.

journal_name

Ann N Y Acad Sci

authors

Secondo A,Staiano IR,Scorziello A,Sirabella R,Boscia F,Adornetto A,Canzoniero LM,Di Renzo G,Annunziato L

doi

10.1196/annals.1387.052

subject

Has Abstract

pub_date

2007-03-01 00:00:00

pages

481-5

eissn

0077-8923

issn

1749-6632

pii

1099/1/481

journal_volume

1099

pub_type

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